The shares of HCA Holdings, Inc. ("HCA") reported on this Form 4 are held of record by Hercules Holding II, LLC ("Hercules II"). Hercules II is held by a private investor group, including affiliates of Bain Capital Investors, LLC ("BCI"), Kohlberg Kravis & Roberts & Co. LLC and HCA founder Dr. Thomas F. Frist, Jr. Affiliates of BCI indirectly own 74,216,126 shares of Common Stock of HCA.

(2)

Includes 13,952,371 shares of Common Stock of HCA indirectly sold by Bain Capital Integral Investors 2006, LLC ("Integral 2006") by virtue of its membership in Hercules II. Because BCI is the administrative member of Integral 2006, BCI may be deemed to beneficially own the 68,969,268 shares of Common Stock of HCA indirectly owned by Integral 2006 by virtue of its membership in Hercules II. BCI disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

(3)

Includes 102,463 shares of Common Stock of HCA indirectly sold by BCIP TCV, LLC ("BCIP TCV") by virtue of its membership in Hercules II. Because BCI is the administrative member of BCIP TCV, BCI may be deemed to beneficially own the 497,466 shares of Common Stock of HCA indirectly owned by BCIP TCV by virtue of its membership in Hercules II. BCI disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

(4)

Includes 978,229 shares of Common Stock of HCA indirectly sold by Bain Capital Hercules Investors, LLC ("Hercules Investors" together with BCI, Integral 2006 and BCIP TCV, the "Bain Entities") by virtue of its membership in Hercules II. Because BCI is the administrative member of Hercules Investors, BCI may be deemed to beneficially own the 4,749,392 shares of Common Stock of HCA indirectly owned by Hercules Investors by virtue of its membership in Hercules II. BCI disclaims beneficial ownership of such securities except to the extent of its pecuniary interest therein.

(5)

As a result of the relationships described in the foregoing footnotes, the Bain Entities may be deemed to beneficially own the 231,892,365 shares of Common Stock of HCA held by Hercules II. Each of the Bain Entities disclaims beneficial ownership of such securities, except to the extent of its pecuniary interest therein.

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